Sliding Window Locks 4 Sets Adjustable Aluminum Stopper
4.5Editor score
Adjustable plastic shims
Aluminum alloy build
Two pad types
10 Best Window Locks for Up and Down Windows (October 2026) Expert Guide
Securing your home starts with the right window locks. Up and down windows need reliable stops to prevent unwanted entry while allowing ventilation.
We compared ten top-rated window locks for up and down windows. Our list covers budget picks, heavy-duty options, and versatile sliding solutions.
Each pick shows key features, ratings, and installation details. Prices change often, so check current offers before buying to get the best deal.
Top 3 Picks for Best Window Locks for Up and Down Windows
ZRFCXE Window Locks, 4 Pack for Horizontal & Vertical Sliding Windows
4.5Editor score
Dual fixing holes for security
Protection pads prevent scratches
Easy three step install
Sliding Door Security Bar, 17-50 in, 1 Heavy Duty Steel
4.2Editor score
One inch steel bar
Fits up to 50 inches
No drilling required
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Top 10 Best Window Locks for Up and Down Windows in 2026 Compared
The following table compares all ten picks side by side to help you choose the best fit for your windows.
ProductsSpecificationsEditor scorePrice
Editor's Choice
ZRFCXE Window Locks, 4 Pack
Dual fixing holes
Vertical key included
Protection pads
3 step install
4.5Editor score
Editor's Choice
Sliding Window Locks 4 Sets
Aluminum alloy
Two pad types
Adjustable shims
No drill needed
4.5Editor score
Best Premium
ZRFCXE Window Locks, 8 Pack
8 lock sets
Vertical key
Dual fixing holes
Heavy duty ready
Prime-Line Sliding Window Lock
Diecast construction
Adjustable jaw
Vinyl only fit
Cam lever lock
4.3Editor score
Sliding Door Security Bar
1 inch steel
Up to 50 inch
Locking pin
Rubber end caps
4.2Editor score
Boao 15 Sets Window Locks
15 lock sets
Keys included
Aluminum alloy
Track fit note
4.3Editor score
Boao 25 Sets Window Locks
25 lock sets
Keys included
Aluminum alloy
Track fit note
4.1Editor score
ZRFCXE Window Locks, 12 Pack
12 lock sets
Vertical key
Dual fixing holes
Protection pads
4.5Editor score
Jayseon 6 Pack Window Locks
Dual screw design
2 types of keys
Rubber cushions
Track fit note
4.3Editor score
4 Sets Sliding Window Locks
White finish
Aluminum build
Rubber cushioning
Key access
3.8Editor score
1. ZRFCXE Window Locks, 4 Pack – Best Overall Window Lock
ZRFCXE Window Locks, 4 Pack
4 lock sets
Vertical key
Protection pads
3 step install
This ZRFCXE set offers reliable security with a 4.5 rating. It features dual fixing holes for strong hold and includes a vertical key.
Pros
- Dual fixing holes
- Protective pads included
- Easy to install
- Vertical key included
- Great value pack
Cons
- Track width limits
- Hex key needed
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It uses protection pads to prevent scratches on window tracks. You can ventilate or lock fully. It suits homes, apartments, and offices.
Track height and width must meet specific limits. You need to measure before buying. The screws may need careful tightening to avoid strip.
Buy it if you want strong, easy locks for sliding windows. It is ideal for renters who need reusable options without drilling.
Strong Hold Design
The dual fixing holes let you secure the lock with screws for better stability and security.
Track Protection
Built in pads protect window tracks from scratches during installation and daily use.
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2. Sliding Window Locks 4 Sets – Best Budget Window Lock
Sliding Window Locks 4 Sets
4 lock sets
Aluminum alloy
Shims included
Two pad types
This budget pick earns a 4.5 rating with solid aluminum alloy build. It comes with both rubber and plastic pads for flexibility.
Pros
- Aluminum build
- Adjustable shims
- Rubber and plastic pads
- Durable rust resistant
- Wide application
Cons
- Track width limit
- Shim needed for wider
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It handles track widths up to 0.39 inches well. Thicker tracks get thin shims to fit. It is ideal for homes and offices.
It needs you to measure track width first. Wide tracks may need shims. The pads are thin so they may wear over time.
Buy it if you need affordable security with durable metal. It suits standard tracks and gives you a good value pack.
Durable Build
Crafted from sturdy aluminum alloy, this lock resists rust and aging for long lasting use.
Track Padding
It includes both rubber and thin plastic pads to prevent scratches and enhance grip.
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3. Sliding Door Security Bar – Best Premium Window Lock
Sliding Door Security Bar
1 inch steel
17 to 50 inch
Locking pin
Rubber end caps
This premium bar rates 4.2 and uses a one inch heavy duty steel. It adjusts up to 50 inches with a locking pin.
Pros
- Heavy duty steel
- Fits up to 50 inches
- Locking pin
- No drill needed
- Easy to remove
Cons
- Higher price
- Gap size check
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It creates a physical barrier across patio doors or wide windows. It needs no tools or drilling. It suits travelers and renters.
It costs more than simple locks. You must measure your gap and check end caps. The bar can slip if the fit is loose.
Buy it for big gaps and sliding doors. It gives strong peace of mind and suits homes that need extra security.
Heavy Duty Build
The one inch steel bar adds a strong physical barrier for extra peace of mind.
No Drill Fit
Rubber end caps grip frames without tools and make setup easy for renters.
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4. Prime-Line Sliding Window Lock – Best For Vinyl Windows
Prime-Line Sliding Window Lock
Diecast build
White painted
Adjustable jaw
2 pack
This lock is rated 4.3 and is made for vinyl windows. It has a white diecast build with an adjustable jaw for rail thickness.
Pros
- Diecast durable
- White finish
- No drill needed
- Vise like grip
- Cam lever lock
Cons
- Vinyl windows only
- Rail thickness check
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It uses a cam style lever for easy locking. It grips firmly without drilling. It suits single hung and horizontal sliding vinyl windows.
It fits only vinyl frames and needs rail checks. Non vinyl windows may not work. The jaw must be hand tightened before locking.
Buy it if you own vinyl windows. It adds secondary security and is ideal for those wanting a white finish lock.
Vinyl Fit
It is designed for vinyl windows only and fits rail thicknesses from 1/16 to 1/2 inch.
Vise Like Grip
The adjustable jaw secures firmly without tools so you can lock quickly.
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5. Boao 15 Sets Sliding Window Locks – Best Bulk Locks
Boao 15 Sets Sliding Window Locks
15 lock sets
Keys included
Aluminum alloy
Track fit check
This set rates 4.3 and includes 15 locks with keys. It uses aluminum alloy to resist rust. It fits tracks above five millimeters.
Pros
- 15 lock sets
- Keys included
- Aluminum alloy
- Rust proof
- Bulk value
Cons
- Track limits
- Keys may get lost
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It lets you secure many windows at once. You can lock partially or fully. It suits apartments and homes with many windows.
Track height and thickness must be within limits. Keys may get lost. The locks are small and may not fit wide tracks.
Buy it for bulk needs and many windows. It gives great value and suits places needing multiple locks with keys.
Bulk Value
Get 15 lock sets with keys at once to cover multiple rooms without extra cost.
Material Quality
Aluminum alloy locks resist rust and provide safety for family and pets.
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6. Boao 25 Sets Sliding Window Locks – Best Large Bulk Locks
Boao 25 Sets Sliding Window Locks
25 lock sets
Keys included
Aluminum alloy
Track fit check
This set rates 4.1 and offers 25 locks with keys. It uses aluminum alloy for durability. It fits tracks above five millimeters.
Pros
- 25 lock sets
- Keys included
- Aluminum alloy
- Rust proof
- Large bulk
Cons
- Track limits
- Lower rating
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It suits homes and offices that need many locks. You can secure fully or partially. It helps keep kids safe.
Track height and thickness must be within limits. Keys may get lost. The locks are small and may not fit wide tracks.
Buy it for large properties with many windows. It gives great value for many rooms and suits places needing bulk safety locks.
Large Bulk Value
Get 25 lock sets with keys at once to cover large properties easily.
Material Durability
Aluminum alloy locks resist rust and serve you for a long time.
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7. ZRFCXE Window Locks, 12 Pack – Best Large Pack Locks
ZRFCXE Window Locks, 12 Pack
12 lock sets
Vertical key
Protection pads
Dual fixing holes
This set rates 4.5 and includes 12 locks with a vertical key. It has dual fixing holes and protection pads for scratch free installs.
Pros
- 12 lock sets
- Vertical key
- Dual fixing holes
- Protection pads
- Heavy duty
Cons
- Track width limits
- Hex key needed
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It suits homes, apartments, and offices. You can ventilate or lock fully. It helps protect property from heavy rain.
Track width and height must meet limits. You must measure before buying. The locks may need careful screw tightening.
Buy it if you need a larger pack of strong locks. It gives great value and suits places needing multiple windows locked.
Strong Hold Design
Dual fixing holes let you secure locks on heavy windows for added security.
Pack Size
Get 12 lock sets to cover many rooms without buying extra sets.
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8. Jayseon 6 Pack Window Locks – Best Adjustable Locks
Jayseon 6 Pack Window Locks
6 lock sets
2 key types
Dual screw
Track fit note
This set rates 4.3 and comes with 2 lock and two types of keys. It features dual screw design for stability.
Pros
- 2 key types
- Dual screw design
- Rubber cushions
- Adjustable fit
- Track fit note
Cons
- Track fit limits
- Keys check
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It works on edges and centers. It uses rubber cushions to prevent scratches. It suits homes, offices, and kindergartens.
Track width and height must meet limits. You may need to adjust fit. The locks may get loose if screws are not tightened.
Buy it if you need adjustable locks for various tracks. It gives a good pack for families and small offices.
Dual Screw Design
The dual screw design adds stability to your window locks so they hold better.
Two Key Types
Get two types of keys for repeated use and better access control.
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9. 4 Sets Sliding Window Locks – Best White Finish Locks
4 Sets Sliding Window Locks
White finish
Aluminum build
4 lock sets
Rubber cushioning
This set rates 3.8 and comes in white. It uses aluminum build with rubber cushioning. It fits both vertical and horizontal tracks.
Pros
- White finish
- Aluminum build
- Rubber cushioning
- Keys included
- Fits both tracks
Cons
- Lower rating
- Track fit check
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It suits apartments and patios. You can use it as a door stopper. It keeps pets safe from escaping.
Track width and height must meet limits. The rating is lower than others. The locks may need more care.
Buy it if you want a white look for windows. It suits homes that need simple locks with a matching finish.
White Finish
A sleek white finish adds to durability and complements various home aesthetics.
Pet Safety
This lock keeps pets from escaping through patio entrances or windows.
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10. 4 Sets Sliding Window Locks – Best Versatile Locks
4 Sets Sliding Window Locks
Fits both tracks
Aluminum build
Keys included
Air conditioner fit
This set rates 3.8 and offers a versatile fit. It suits sliding glass doors and windows. It can be a storm window latch too.
Pros
- Fits both tracks
- Versatile fit
- Aluminum build
- Locking with key
- Air conditioner
Cons
- Lower rating
- Track fit check
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It works on inside or center tracks. You can lock fully or slightly ajar. It keeps air conditioners secure.
Track width and height must meet limits. The rating is lower than others. The locks may need more care.
Buy it for homes needing a flexible lock. It suits those who want a simple fix for multiple room types.
Versatile Fit
This security bar adapts to sliding windows or doors making home security simple.
Air Conditioner Fit
It also works as a window lock for air conditioners to keep units secure.
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Buying Guide – How to Choose the Best Window Locks for Up and Down Windows
Choosing the right window lock depends on fit, durability, and your window type.
Track Dimensions
Measure the height and width of your window track. Locks only fit if your track is within the specified range. This avoids buying locks that do not work.
Always measure before ordering to ensure a proper fit for your windows.
Material Build
Look for durable materials like aluminum or steel. Strong locks resist rust and deformation over time. This gives you better security.
Choose sturdy materials to get long lasting window security.
Lock Type
Select between screws, keys, or bars based on your needs. Some locks are for ventilation, others for full lock. This helps with safety.
Pick a lock type that matches your security goals.
Track Protection
Check if locks include protective pads or cushions. These prevent scratches on your window track. It keeps your windows in good shape.
Look for locks with built in protection for your window track.
Installation Needs
Consider if tools or drilling are required. Many locks need simple steps only. This suits renters and homeowners alike.
Choose easy install options for quick setup and reuse.
Package Size
Decide on the number of locks needed for your home. Bulk packs save money when covering multiple windows. This gives better value.
Buy a package size that covers all your windows.
Window Type
Verify if locks fit vertical or horizontal tracks. Some locks are made for vinyl only. This ensures the lock works.
Confirm compatibility with your window type before buying.
Ratings and Reviews
Look at customer ratings and read reviews. High rated locks tend to be more reliable. This helps you avoid poor picks.
Check ratings to choose a reliable window lock.
How to Use and Care for Your Window Locks for Up and Down Windows
Measure your window track height and width before installing. Place the lock in your desired position on the track.
Insert protective pads or cushions to avoid scratches. Tighten screws or key the lock to secure it.
Test the lock by opening and closing the window. Clean tracks regularly to keep locks working smoothly.
Frequently Asked Questions
Do window locks for up and down windows fit sliding glass doors?
Many locks work on both windows and doors. Check the product description to confirm it fits sliding door tracks. Some locks are made for patio doors.
How do I measure my window track size?
Measure the track height and width before buying. Make sure the height and width are within the product limits. Use a tape measure to get accurate values.
Can window locks be removed and reused?
Yes, many locks can be removed and reinstalled. Follow the install steps to take them off without damage. This suits renters who move often.
Are there window locks that do not need keys?
Some locks use screws or bars instead of keys. These avoid lost key issues. Check if the lock type fits your needs.
What if my window track is wider than the lock allows?
Use plastic shims to fill gaps for wider tracks. Some locks come with shims to adjust fit. Measure before ordering to ensure a proper fit.
How many window locks should I install in my home?
Install locks on all accessible windows. Bulk packs help you cover multiple rooms. This gives complete safety for your home.
Are window locks suitable for vinyl windows only?
Some locks work on vinyl only. Others fit metal or wooden tracks too. Check product specs to know the correct window type.
Final Thoughts on Choosing the Best Window Locks for Up and Down Windows
The top picks cover various needs from budget to heavy-duty. ZRFCXE leads with solid features. The security bar suits large gaps.
Choose locks that match your track size and material. Consider bulk packs for multiple rooms.
Prices and stock change often. Check current offers on Amazon for the best deal today.